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Geologic Time – Period prior to humans. 4.6 billion to 3 million years ago. (See "prehistoric periods" for more detail into this.) (See "prehistoric periods" for more detail into this.) Primatomorphid Era – Period prior to the existence of Primatomorpha
Elsewhere in North America, as in Illinois, the Yarmouth Soil also has developed over a variable number of multiple glacial - interglacial cycles. [4] [8] Thus, the presumption that the Yarmouth Soil, by which the Yarmouthian (Yarmouth) Interglacial was later defined, represents a single interglacial stage or period has been completely discredited.
The book presents a geological history of North America, and was researched and written over the course of two decades beginning in 1978. It consists of a compilation of five books, the first four of which were previously published as Basin and Range (1981), In Suspect Terrain (1983), Rising from the Plains (1986), and Assembling California ...
This list of historical fiction is designed to provide examples of notable works of historical fiction (in literature, film, comics, etc.) organized by time period.. For a more exhaustive list of historical novels by period, see Category:Historical novels by setting, which lists relevant Wikipedia categories; see also the larger List of historical novels, which is organized by country, as well ...
After the Cretaceous, a new era of geologic time began; the Cenozoic era, which means the era of "recent life". Traditionally, the first period of the Cenozoic was called the Tertiary , [ 131 ] however recent recommendations of the International Commission on Stratigraphy discourage its use, with the correspondent time span divided between the ...
Sevier orogeny – Mountain-building episode in North America – Rocky Mountains, western North America, (140–50 Ma) Laramide orogeny – Period of mountain building in North America – Rocky Mountains, western North America, (40–70 Ma) Pasadena orogeny – Transverse Ranges, western North America, Pleistocene Period to present day
It precedes the Sangamonian Stage (corresponding to the global Last Interglacial) and follows the Pre-Illinoian Stage in North America. The Illinoian Stage is defined as the period of geologic time during which the glacial tills and outwash, which comprise the bulk of the Glasford Formation, accumulated to create the Illinoian Glacial Lobe. [1]
This work assessed the geologic history of the currently defined eons and eras of the pre-Cambrian, [note 2] and the proposals in the "Geological Time Scale" books 2004, [74] 2012, [5] and 2020. [75] Their recommend revisions [4] of the pre-Cryogenian geologic time scale were (changes from the current scale [v2023/09] are italicised):